feat: add capability to add extends configuration to release-it

Fixes release-it#1180

lib/config.js

@@ -38,6 +38,31 @@ const getLocalConfig = ({ file, dir = process.cwd() }) => {
   return result && _.isPlainObject(result.config) ? result.config : localConfig;
 };
 
+const fetchConfigurationFromGitHub = async pattern => {
+  const regex = /^github>([^/]+)\/([^#]+)(?::([^#]+))?(?:#(.+))?$/;
+  const match = pattern.match(regex);
+
+  if (!match) {
+    throw new Error('Invalid Remote Configuration from GitHub');
+  }
+
+  const [, owner, repo, file = '.release-it.json', tag] = match;
+  const branchOrTag = tag ? `refs/tags/${tag}` : 'HEAD';
+  const url = `https://raw.githubusercontent.com/${owner}/${repo}/${branchOrTag}/${file}`;
+
+  const response = await fetch(url);
+
+  if (!response.ok) {
+    throw new Error(`Failed to fetch ${url}: ${response.statusText}`);
+  }
+
+  return response.json();
+};
+
+const getRemoteConfiguration = async configuration => {
+  return fetchConfigurationFromGitHub(configuration);
+};
+
 class Config {
   constructor(config = {}) {
     this.constructorConfig = config;
@@ -83,6 +108,10 @@ class Config {
     );
   }
 
+  mergeRemoteOptions(remoteConfiguration) {
+    return _.merge({}, this.options, remoteConfiguration);
+  }
+
   getContext(path) {
     const context = _.merge({}, this.options, this.contextOptions);
     return path ? _.get(context, path) : context;
@@ -138,4 +167,6 @@ class Config {
   }
 }
 
+export { getRemoteConfiguration };
+
 export default Config;

lib/index.js

@@ -1,7 +1,7 @@
 import _ from 'lodash';
 import { getPlugins } from './plugin/factory.js';
 import Logger from './log.js';
-import Config from './config.js';
+import Config, { getRemoteConfiguration } from './config.js';
 import Shell from './shell.js';
 import Prompt from './prompt.js';
 import Spinner from './spinner.js';
@@ -14,6 +14,12 @@ const runTasks = async (opts, di) => {
     Object.assign(container, di);
     container.config = container.config || new Config(opts);
 
+    if ('extends' in container.config.localConfig) {
+      const remoteConfiguration = await getRemoteConfiguration(container.config.localConfig.extends);
+
+      container.config.options = container.config.mergeRemoteOptions(remoteConfiguration);
+    }
+
     const { config } = container;
     const { isCI, isVerbose, verbosityLevel, isDryRun, isChangelog, isReleaseVersion } = config;